LP3942 datasheet(1/20 Pages) NSC

部件名	LP3942

功能描述	The Dual RGB LED Controller with 1.5x/2x Charge Pump and SPI Interface

PDF	20 Pages

Scroll/Zoom	100%

制造商	NSC [National Semiconductor (TI)]

网页	http://www.national.com

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1 / 20 page

LP3942

The Dual RGB LED Controller with 1.5x/2x Charge Pump

and SPI Interface

General Description

The LP3942 is an integrated stand-alone RGB LED control-

ler with a high efficiency and low noise programmable 1.5x

and 2x charge pump. The RGB LEDs are controlled through

the low voltage SPI interface. RGB programmability allows

unique color and brightness control with both RGB outputs.

The color control has preselected color settings for color

blending. The LED current control is done using constant

current sinks that can be also used as switches. The non-

overlapping RGB output PWM control minimizes the input

noise.

See also: LP3931, LP3933 and LP3936 Lighting Manage-

ment Units

Features

n

Pre-regulated 1.5x and 2x charge pump with regulated

output (4.5V and 5.0V)

n

2 separately controlled PWM RGB LED drivers with

programmable color and brightness

n

Overlapping and non-overlapping RGB mode

n

Wide input voltage range 3V–5.0V

n

Output current up to 120 mA

n

Low voltage SPI interface

n

Programmable low current Standby mode

n

Tiny LLP24 package (5mm*4mm*0.8mm)

Applications

n

Cellular Phones, PDAs

Typical Application

20129201

PRELIMINARY

November 2004

DS201292

www.national.com

类似零件编号 - LP3942

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Texas Instruments	LP3941	1Mb / 34P	Cellular Phone Power Management Unit
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